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Short Crack Growth in Al 6013-T6

Tesch, Andreas and Pippan, Reinhard and Trautmann, Karl-Heinz and Döker, Hubert (2006) Short Crack Growth in Al 6013-T6. In: Fatigue 2006, Proceedings 9th International Fatigue Congress May 14-19, 2006 Atlanta , Georgia, USA. Elsevier Ltd., GB. Fatigue 2006, 9th International Fatigue Congress, 2006-05-14 - 2006-05-19, Atlanta, Georgia, USA.

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Abstract

The fatigue crack growth behaviour of short corner cracks in the Aluminium alloy Al 6013-T6 was investigated. The aim was to determine the crack growth rates of small corner cracks at a stress ratio of R = 0,1, R = 0,7 and R = 0,8 and to find a possibility to predict these crack growth rates from fatigue crack growth curves determined for long cracks. Corner cracks were introduced into M(T)-specimens at one side of a hole (Ø = 4.8 mm) by compression loads (R=20). The precracks were smaller than 100µm (notch + precrack). A completely new method was used to cut very small notches (10 – 50µm) into the specimens with a Focussed Ion Beam. The results of the fatigue crack growth tests with short corner cracks were compared with the long fatigue crack growth test data. The short cracks grew at K values below the threshold for long cracks at the same stress ratio. They also grew faster than long cracks at the same K-values and the same stress ratios. A model was created on the basis of constant Kmax-tests on long cracks that predicts the short crack growth behaviour very well.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Short Crack Growth in Al 6013-T6
Authors:
AuthorsInstitution or Email of Authors
Tesch, AndreasUNSPECIFIED
Pippan, ReinhardErich Schmid Institute of Material Science, Austrian Academy of Sciences, Leoben
Trautmann, Karl-HeinzUNSPECIFIED
Döker, HubertUNSPECIFIED
Date:May 2006
Journal or Publication Title:Fatigue 2006, Proceedings 9th International Fatigue Congress May 14-19, 2006 Atlanta , Georgia, USA
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:Elsevier Ltd., GB
Status:Published
Keywords:fatigue crack growth, long cracks, short corner cracks, focussed ion beam, constant Kmax-tests, prediction model, threshold, aluminium alloys
Event Title:Fatigue 2006, 9th International Fatigue Congress
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:2006-05-14 - 2006-05-19
Organizer:Elsevier Ltd.
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Mechanical Testing of Materials
Deposited By: Dr.-Ing. Hubert Döker
Deposited On:12 Dec 2006
Last Modified:14 Jan 2010 23:57

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